Gas prices at Pacific bases are continuing their steady climb in recent weeks and will jump another 10 cents Saturday, according to the Army and Air Force Exchange Service.

Midgrade unleaded at military exchange gas stations in mainland Japan and Okinawa will increase to $2.57 a gallon while regular and premium gas in South Korea will cost $2.71 and $2.93, respectively. On Guam, a gallon of regular unleaded will run $2.80.

Diesel prices in Japan rose dramatically this week as well, rising 15 cents to $2.34 a gallon.

AAFES adjusts its fuel prices weekly, factoring in the average cost for gasoline in the States. Navy Exchange gas stations set their pumps to mirror AAFES prices.

Drivers in mainland Japan and Okinawa, who receive a 25-cent-per-gallon discount from the Japanese government, are still paying about 15 cents less for midgrade than the U.S. national average, which was $2.73 on Monday, according to U.S. Department of Energy estimates.

Meanwhile, prices in South Korea and Guam again remained above the U.S. national averages, which increased to $2.62 for regular and $2.84 for premium.

Gas prices throughout the Pacific have been creeping up steadily since February. But in the past month alone they have jumped up more than 50 cents per gallon.